16 Apr
2013
16 Apr
'13
11:55 p.m.
On Tue, 16 Apr 2013, Jerald A DeLong wrote:
This year some residential access networks will shut off IPv4 in a way
that prevents running an amprnet gateway over IPIP or IPUDP tunneling.
Operators are putting IPv4 more and more behind "carrier-grade NAT"
devices, and not giving any public IPv4 addresses to the customers at all.
The NAT is being done on the operator's device, so plain IPIP or IPUDP
tunneling as we do it now won't work at all.
At the same time, some of them are starting to give public, routable IPv6
addresses to the end customer. If you use IPv6 for your connection, you
bypass the NAT! You could do IPv4 over IPv6 tunneling to get your AMPRnet,
for example, but since not all gateways have IPv6, you couldn't have a
full mesh of connections to all other gateways. There could be a set of
IPv4+IPv6 enabled gateways which would relay traffic for you from
IPv4-only gateways. Or something like that.
For example, see DS-Lite:
http://en.wikipedia.org/wiki/IPv6_transition_mechanisms#Dual-Stack_Lite_.28…
Not all network operators will be doing this, but some. At work we talk
with operators a lot, since we make software for them to sell and deliver
to their end customers. We're getting questions about IPv6 deployment and
operators are checking with us how our software will work when they
deploy.
- Hessu, OH7LZB
Some networks
don't speak IPv4 anymore.
This will have to be addressed in *NOS in time (or abandonment).
Dual stacked nodes are going to be in use for some time ipv4 isn't going
to get shut off tomorrow.